145808428 has 12 divisors (see below), whose sum is σ = 257506480. Its totient is φ = 72235152.

The previous prime is 145808419. The next prime is 145808447. The reversal of 145808428 is 824808541.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166776 + ... + 167647.

Almost surely, 2^145808428 is an apocalyptic number.

It is an amenable number.

145808428 is a deficient number, since it is larger than the sum of its proper divisors (111698052).

145808428 is a wasteful number, since it uses less digits than its factorization.

145808428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334536 (or 334534 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 145808428 is about 12075.1160656948. The cubic root of 145808428 is about 526.3333340909. Note that the first 5 decimals are identical.

The spelling of 145808428 in words is "one hundred forty-five million, eight hundred eight thousand, four hundred twenty-eight".